وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الْيَمِينُ عَلَى نِيَّةِ الْمُسْتَحْلِفِ»
He reported God’s Messenger as saying, “An oath is to be interpreted according to the intention of the one who takes it.”
Mishkat al-Masabih 3283, Book 16, Oaths and Vows, Hadith 11. 1 min read